The bottom-up approach results in a more detailed schedule, but itâs also a time-consuming approach compared with the top-down task planning approach. The schedule you create is based on direct input from experts who will be implementing the project; itâs also a useful technique to build teamwork.
Another sort of smell is caused by the acidity of rain. Because of chemicals in the atmosphere, rainwater tends to be somewhat acidic, especially in urban environments. When it comes in contact with organic debris or chemicals on the ground, it can cause some particularly aromatic reactions.
For users of city water supplies or wells, a musty smell often results from sediment leaching into the plumbing system. Over time, decaying organic matter can find its way into water supplies and produce earthy aromas.